Novak Djokovic (right) of Serbia shakes hands at the net after his straight sets victory against Rafael Nadal of Spain during the men�s singles semifinal match of the Barclays ATP World Tour Finals at...
Novak Djokovic (right) of Serbia shakes hands at the net after his straight sets victory against Rafael Nadal of Spain during the men�s singles semifinal match of the Barclays ATP World Tour Finals at...